Thank-you for incorporating the stethoscope - it has great potential. Entry #13 is on the right track - keeping the figure with the two mountains - I'm just not sure of the placement of the stethoscope. It looks like it's trying to slither up the mountain! Entry #14 was ranked lower because it may appear as if there are three separate ideas-Mountains, then man, then stethoscope. Also, entry #15 is the less desirable because the mountains now look like a cardiac rhythm and the stethoscope looks too big for the picture.
As per font, I like blue color in "Helping you feel better" and would prefer both the title font and slogan to be bolded text. Finally, the little swoosh under the "better" was a nice touch, or possibly, an alternate placement for the stethoscope could be under the "feel better" words of the slogan?
This has been great fun - too bad it all ends tomorrow.
Thank-you very much for your efforts.